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| author | Prasanna S. Panchamukhi <prasannax.s.panchamukhi@intel.com> | 2010-04-08 16:24:28 -0700 |
|---|---|---|
| committer | Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> | 2010-05-11 14:06:12 -0700 |
| commit | a40242f2cde38ccb04d4c35cad66aab3c047fa6a (patch) | |
| tree | d92b9bf7a6dac8e364c6384335ed39e33408933e /drivers/net/wimax | |
| parent | e6dd789af1823908ed3ccda26bf07faf5970bce1 (diff) | |
| download | lwn-a40242f2cde38ccb04d4c35cad66aab3c047fa6a.tar.gz lwn-a40242f2cde38ccb04d4c35cad66aab3c047fa6a.zip | |
wimax/i2400m: limit the message size upto 16KiB [v1]
According to Intel Wimax i3200, i5x50 and i6x50 specification
documents, the maximum size of each TX message can be upto 16KiB.
This patch modifies the i2400m_tx() routine to check that the
message size does not exceed the 16KiB limit.
Please refer the documentation in the code for details.
Signed-off-by: Prasanna S. Panchamukhi <prasannax.s.panchamukhi@intel.com>
Diffstat (limited to 'drivers/net/wimax')
| -rw-r--r-- | drivers/net/wimax/i2400m/tx.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/net/wimax/i2400m/tx.c b/drivers/net/wimax/i2400m/tx.c index b10c3b77c27e..a5002c8467c2 100644 --- a/drivers/net/wimax/i2400m/tx.c +++ b/drivers/net/wimax/i2400m/tx.c @@ -283,6 +283,11 @@ enum { + I2400M_TX_PLD_MAX * sizeof(struct i2400m_pld), I2400M_TX_SKIP = 0x80000000, /* + * According to Intel Wimax i3200, i5x50 and i6x50 specification + * documents, the maximum size of each message can be up to 16KiB. + */ + I2400M_TX_MSG_SIZE = 16384, + /* * 16 byte aligned MAX_MTU + 4 byte payload prefix. */ I2400M_MAX_MTU_ALIGN = 16, @@ -682,7 +687,13 @@ try_new: } if (i2400m->tx_msg == NULL) goto error_tx_new; - if (i2400m->tx_msg->size + padded_len > I2400M_TX_BUF_SIZE / 2) { + /* + * Check if this skb will fit in the TX queue's current active + * TX message. The total message size must not exceed the maximum + * size of each message I2400M_TX_MSG_SIZE. If it exceeds, + * close the current message and push this skb into the new message. + */ + if (i2400m->tx_msg->size + padded_len > I2400M_TX_MSG_SIZE) { d_printf(2, dev, "TX: message too big, going new\n"); i2400m_tx_close(i2400m); i2400m_tx_new(i2400m); |